TP6 | Late accretion and early differentiation of rocky planetary bodies, from planetesimals to super-Earths

TP6

Late accretion and early differentiation of rocky planetary bodies, from planetesimals to super-Earths
Co-organized by SB/EXOA
Conveners: Valentin Bonnet Gibet , Kathryn Dodds, Simon Matthews, Pierru Rémy, Harry Becker, Doris Breuer, Harald Hiesinger, STEPHAN KLEMME, Kai Wünnemann

The early history of many rocky planetary bodies is dominated by differentiation into a silicate magma ocean, and an iron-alloy core. This is then followed by the solidification of the magma ocean and the first stages of crustal formation, as well as the formation of heterogeneities that may be preserved until the present day. Additionally, during this time, these bodies are still able to accrete new material, which can further alter their composition, size, and structure. Therefore, the accretionary and differentiation history of a rocky body has a profound influence on its subsequent geodynamic evolution, leading to divergent evolutions of planetary bodies within the same solar system e.g. the terrestrial planets. However, the complexity of the physical and chemical processes at play, as well as the paucity of samples, makes elucidating the conditions of late accretion and differentiation a present challenge.

This session invites contributions from all fields of planetary sciences that enlighten our understanding of the influence of late accretion and the physicochemical processes and conditions of planetary differentiation on the early evolution of rocky bodies, both in our own solar system, and in exoplanetary system. We especially encourage submissions from early career researchers.

The early history of many rocky planetary bodies is dominated by differentiation into a silicate magma ocean, and an iron-alloy core. This is then followed by the solidification of the magma ocean and the first stages of crustal formation, as well as the formation of heterogeneities that may be preserved until the present day. Additionally, during this time, these bodies are still able to accrete new material, which can further alter their composition, size, and structure. Therefore, the accretionary and differentiation history of a rocky body has a profound influence on its subsequent geodynamic evolution, leading to divergent evolutions of planetary bodies within the same solar system e.g. the terrestrial planets. However, the complexity of the physical and chemical processes at play, as well as the paucity of samples, makes elucidating the conditions of late accretion and differentiation a present challenge.

This session invites contributions from all fields of planetary sciences that enlighten our understanding of the influence of late accretion and the physicochemical processes and conditions of planetary differentiation on the early evolution of rocky bodies, both in our own solar system, and in exoplanetary system. We especially encourage submissions from early career researchers.